What is calcium stearate? Calcium stearate is a chemical product with small white particles, soluble in hot ethanol and other solvents, which can be heated to 400 ℃ or decomposed in case of acid and alkali, and has hygroscopicity. Gaomi Boyu Chemical introduces that calcium stearate generally has the following effects in use: although calcium stearate is rarely added to coated sand, it plays a very important role in preventing caking of coated sand, improving liquidity, and improving shelling resistance and demoulding resistance, The quality of calcium stearate not only affects the strength of coated sand but also plays an important role in the high-temperature performance of coated sand. Adding a certain amount of silica in the Synthesis of calcium stearate can greatly improve the high-temperature performance of calcium stearate in coated sand.
Synthesis of calcium stearate 1. Direct method: add a certain amount of stearic acid and CaO into the reaction pot equipped with an agitator and thermometer, heat up to melt, slowly add catalyst H2O2 under constant stirring, vacuum, control the reaction temperature at 140~150 ℃, and react for 1.5~2.0h. After the reaction is completed, discharge, cool, and crush to obtain the product 2. Double decomposition method: Dissolve stearic acid in 20 times hot water, add saturated caustic soda solution and saponify at about 75 ℃ to generate a dilute sodium stearate solution. Then add calcium chloride solution with a 1074kg/m3 into sodium stearate solution, perform a double decomposition reaction at about 65 ℃, and precipitate the product calcium stearate. Then filter, wash, and dry at about 90 ℃ to obtain the finished product.
Use of calcium stearate 1. It is used in oil field operations as a lubricant and releasing agent. It is also used as a heat stabilizer for PVC and a lubricant and release agent for various plastics processing. In hard products, it can be used in combination with basic lead salts and lead soaps to improve the gelling speed. It is also used in food packaging, medical appliances, soft films, and appliances that require no poison. It can also be used as a halogen absorbent for polyethene and polypropylene; to eliminate the adverse effects of residual catalyst on colour and stability, it can be used as a plasticizer in rubber processing to soften natural rubber and synthetic rubber without affecting vulcanization. It can also be used as a thickener for lubricating grease, a waterproof agent for textiles, a matting agent for paints, and a plasticizer for making plastic records 2. Calcium stearate is a good non-toxic heat stabilizer and lubricant and a smooth and water-resistant agent for adhesives and coatings. It is widely used in plastic, rubber and other chemical production processes. Its heat stability effect is not as good as barium stearate, lead stearate, tin stearate and cadmium stearate. However, it is cheap and easy to obtain, has low toxicity, and has good processing performance. It synergizes with zinc soap and epoxy compounds to improve heat stability. It is commonly used in food packaging films. It is also widely used as a lubricant and release agent for thermosetting plastics such as polyolefin, polyester-reinforced plastics, phenolic resin, amino resin, etc.
Price of calcium stearate Calcium stearate particle size and purity will affect the product's price, and the purchase volume can also affect the cost of calcium stearate. A large amount of large amount will be lower. The price of calcium stearate can be found on our company's official website.
Calcium stearate supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including calcium stearate, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective calcium stearate, you are welcome tocontact us or inquire any time.
